Fastening tool

ABSTRACT

A fastening tool includes: a cylindrical rotation guide member extending in one direction and rotatably supported; a holding member having an opening in which a driver bit is detachably inserted, and configured to move in an axis direction along the extension direction of the rotation guide member inside the rotation guide member and to rotate together with the rotation guide member; and a moving member configured to move the holding member in a front and rear direction along the rotation guide member; a rotation member; and a transmission member connected to the moving member and having flexibility to be wound along an outer periphery of the rotation member. The rotation member is rotated by the motor, so that the moving member is moved with the transmission member in one direction in which a screw engaged with the driver bit is pressed against a fastening target.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based on and claims priority under 35 USC 119 fromJapanese Patent Application No. 2021-034722 filed on Mar. 4, 2021,Japanese Patent Application No. 2021-034723 filed on Mar. 4, 2021,Japanese Patent Application No. 2021-034724 filed on Mar. 4, 2021,Japanese Patent Application No. 2021-034725 filed on Mar. 4, 2021,Japanese Patent Application No. 2021-149653 filed on Sep. 14, 2021, andJapanese Patent Application No. 2021-149654 filed on Sep. 14, 2021, thecontents of which are incorporated herein by reference and priority isdarned to each.

TECHNICAL FIELD

The present invention relates to a fastening tool configured to engage adriver bit with a screw, to push and press the screw against a fasteningtarget with the driver bit, and to rotate the driver bit for screwing.

BACKGROUND ART

Known is a tool called a portable striking machine configured to strikeout connected stoppers loaded in a magazine sequentially from a tip endof a driver guide by using an air pressure of a compressed air suppliedfrom an air compressor or a combustion pressure of a gas.

In a tool configured to fasten a screw by rotating a bit and to move thebit in a direction in which the screw is fastened, in the related art,suggested is an air pressure-type screw striking machine configured torotate a bit by an air motor and to move the bit by an air pressure in adirection in which a screw is fastened (for example, refer to PTL 1).

Since the tool configured to use an air pressure is not provided with amotor and the like, a substrate on which electronic componentsconstituting a control circuit and the like are mounted is not required.On the other hand, it is necessary to connect and use an air hose, whichdeteriorates a handling property.

In contrast, suggested is a screw striking machine configured tocompress a spring by a drive force of a motor configured to rotate ascrew, and to strike the screw by urging of the spring (for example,refer to PTL 2).

CITATION LIST Patent Literature

-   PTL 1: Japanese Patent No. 5,262,461-   PTL 2: Japanese Patent No. 6,197,547

In any of the screw striking machine configured to use the air pressureand the screw striking machine configured to strike a screw by urging ofthe spring, it is difficult to control an amount of movement of thedriver bit in the direction in which the screw is fastened.

In addition, as for an electric screw striking machine used with holdinga handle by a hand, a configuration is suggested in which a battery isattached to a lower part of the handle and a substrate is providedbetween the handle and the battery. However, with such a configuration,a dimension of the tool along an extension direction of the handle isincreased.

SUMMARY

The present invention has been made to solve such problems, and anobject of the present invention is to provide a fastening tool capableof easily controlling an amount of movement of a driver bit in adirection in which a screw is fastened.

Another object of the present invention is to provide a fastening toolconfigured to suppress an increase in dimension of the tool along anextension direction of a handle.

In order to solve the above-described problems, the present inventionprovides a fastening tool including a cylindrical rotation guide memberextending in one direction and rotatably supported by a bearing; aholding member having an opening in which a driver bit is detachablyinserted, and configured to move in an axis direction along theextension direction of the rotation guide member inside the rotationguide member and to rotate together with the rotation guide member; amoving member configured to move the holding member in a front and reardirection along the rotation guide member; a rotation member configuredto be driven and to rotate by a motor; and a transmission memberconnected to the moving member and having flexibility to be wound alongan outer periphery of the rotation member, wherein the rotation memberis rotated by the motor, so that the moving member is moved with thetransmission member in one direction in which a screw engaged with thedriver bit is pressed against a fastening target.

In addition, the present invention provided a fastening tool including atool body extending in one direction; a handle extending in anotherdirection intersecting with the extension direction of the tool body; anaccommodating unit provided on one side of the handle along theextension direction of the tool body and configured to accommodatetherein consumables; and a substrate accommodating part provided on asurface of a side, which faces the handle, of the accommodating unit andconfigured to accommodate therein a substrate.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1A is a side cross-sectional view showing an example of an internalstructure of a fastening tool according to the present embodiment.

FIG. 1B is a top cross-sectional view showing the example of theinternal structure of the fastening tool according to the presentembodiment.

FIG. 1C is a front cross-sectional view showing the example of theinternal structure of the fastening tool according to the presentembodiment.

FIG. 2A is an exploded perspective view showing the example of theinternal structure of the fastening tool according to the presentembodiment.

FIG. 2B is an outer perspective view showing an example of the fasteningtool according to the present embodiment.

FIG. 3A is a perspective view showing an example of a main partconfiguration of the fastening tool according to the present embodiment.

FIG. 3B is a perspective view showing the example of the main partconfiguration of the fastening tool according to the present embodiment.

FIG. 4A is a sectional perspective view showing the example of the mainpart configuration of the fastening tool according to the presentembodiment.

FIG. 4B is a sectional perspective view showing the example of the mainpart configuration of the fastening tool according to the presentembodiment.

FIG. 4C is a sectional perspective view showing the example of the mainpart configuration of the fastening tool according to the presentembodiment.

FIG. 5 is a top cross-sectional view showing the example of the mainpart configuration of the fastening tool according to the presentembodiment.

FIG. 6A is a top cross-sectional view showing the example of theinternal structure of the fastening tool according to the presentembodiment.

FIG. 6B is a top cross-sectional view showing the example of theinternal structure of the fastening tool according to the presentembodiment.

FIG. 7A is a cross-sectional view showing an example of anattaching/detaching holding mechanism.

FIG. 7B is a cross-sectional view showing the example of theattaching/detaching holding mechanism.

FIG. 8A is a perspective view showing the example of theattaching/detaching holding mechanism.

FIG. 8B is a perspective view showing the example of theattaching/detaching holding mechanism.

FIG. 9 is a perspective view showing an example of a screw feeding unitand a nose unit according to present embodiment.

FIG. 10A is a perspective view showing the example of the fastening toolaccording to the present embodiment, as seen from the rear.

FIG. 10B is a perspective view showing the example of the fastening toolaccording to the present embodiment, as seen from the rear.

FIG. 10C is a perspective view showing the example of the fastening toolaccording to the present embodiment, as seen from the rear.

FIG. 11 is a perspective view showing an example of a setting unit.

FIG. 12A is a side cross-sectional view showing an example of anoperation of the fastening tool according to the present embodiment.

FIG. 12B is a top cross-sectional view showing the example of theoperation of the fastening tool according to the present embodiment.

FIG. 13A is a cross-sectional view showing a fastened state of a screw.

FIG. 13B is a cross-sectional view showing a fastened state of thescrew.

FIG. 13C is a cross-sectional view showing a fastened state of thescrew.

DESCRIPTION OF EMBODIMENTS

Hereinafter, an embodiment of the fastening tool of the presentinvention will be described with reference to the drawings.

Configuration Example of Fastening Tool of Present Embodiment

FIG. 1A is a side cross-sectional view showing an example of an internalstructure of a fastening tool according to the present embodiment, FIG.1B is a top cross-sectional view showing the example of the internalstructure of the fastening tool according to the present embodiment, andFIG. 1C is a front cross-sectional view showing the example of theinternal structure of the fastening tool according to the presentembodiment. In addition, FIG. 2A is an exploded perspective view showingthe example of the internal structure of the fastening tool according tothe present embodiment, and FIG. 2B is an outer perspective view showingan example of the fastening tool according to the present embodiment.

A fastening tool 1 of the present embodiment includes a bit holding unit3 configured to hold a driver bit 2 so as to be rotatable and to bemovable in an axis direction, a first drive unit 4 configured to rotatethe driver bit 2 held by the bit holding unit 3, and a second drive unit5 configured to move the driver bit 2 held by the bit holding unit 3 inthe axis direction.

In addition, the fastening tool 1 includes a screw accommodating unit 6in which a screw 200 is accommodated, a screw feeding unit 7 configuredto feed the screw accommodated in the screw accommodating unit 6, and anose unit 8 configured to be pressed against a fastening target to whichthe screw 200 is to be fastened, and to eject the screw.

In addition, the fastening tool 1 includes a tool body 10 and a handle11. Further, the fastening tool 1 includes a battery attaching part 13to which a battery 12 is detachably attached, at an end portion of thehandle 11.

In the fastening tool 1, the tool body 10 extends in one direction alongan axis direction of the driver bit 2 denoted with arrows A1 and A2, andthe handle 11 extends in another direction intersecting with theextension direction of the tool body 10. In the fastening tool 1, theextension direction of the tool body 10, i.e., the axis direction of thedriver bit 2 denoted with arrows A1 and A2 is referred to as ‘front andrear direction’. In addition, in the fastening tool 1, the extensiondirection of the handle 11 is referred to as ‘upper and lowerdirection’. Further, in the fastening tool 1, a direction orthogonal tothe extension direction of the tool body 10 and the extension directionof the handle 11 is referred to as ‘right and left direction’.

The first drive unit 4 is provided at the rear, which is one side of thetool body 10, with the handle 11 interposed therebetween. In addition,the second drive unit 5 is provided at the front, which is the otherside of the tool body 10, with the handle 11 interposed therebetween.

In the screw accommodating unit 6, a plurality of screws 200 areconnected by a connecting band and a spirally wound connected screw isaccommodated.

FIGS. 3A and 3B are perspective views showing an example of a main partconfiguration of the fastening tool according to the present embodiment,FIGS. 4A to 4C are sectional perspective views showing the example ofthe main part configuration of the fastening tool according to thepresent embodiment, and FIG. 5 is a top cross-sectional view showing theexample of the main part configuration of the fastening tool accordingto the present embodiment, showing details of the bit holding unit 3 andthe first drive unit 4. Next, the bit holding unit 3 and the first driveunit 4 are described with reference to the respective drawings.

The bit holding unit 3 includes a holding member 30 configured todetachably hold the driver bit 2, a rotation guide member 31 configuredto support the holding member 30 so as to be movable in the front andrear direction denoted with the arrows A1 and A2 along the axisdirection of the driver bit 2, and to rotate together with the holdingmember 30, a moving member 32 configured to move the holding member 30in the front and rear direction along the rotation guide member 31, andan urging member 33 configured to urge the moving member 32 in arearward direction denoted with the arrow A2.

The holding member 30 is constituted by, for example, a circularcylinder-shaped member having an outer diameter slightly smaller than aninner diameter of the rotation guide member 31, and configured to beinserted inside the rotation guide member 31. The holding member 30 isprovided at an end portion on a front side along the axis direction ofthe driver bit 2 with an opening 30 a having a shape that matches across-sectional shape of the driver bit 2. The holding member 30 has anattaching/detaching holding mechanism 30 c configured to detachably holdthe driver bit 2 and provided in the opening 30 a. In the holding member30, the opening 30 a is exposed inside the rotation guide member 31, andthe driver bit 2 is detachably inserted in the opening 30 a.

The rotation guide member 31 extends along the extension direction ofthe tool body 10, i.e., the front and rear direction denoted with thearrows A1 and A2 along the axis direction of the driver bit 2. Therotation guide member 31 has a cylindrical shape in which the holdingmember 30 is inserted, and an end portion on a front side is rotatablysupported via a bearing 34 a, which is an example of the bearing, by ametal front frame 10 b provided on a front side of a resin case 10 aconstituting an exterior of the tool body 10. In addition, an endportion on a rear side of the rotation guide member 31 is connected tothe first drive unit 4.

In the rotation guide member 31, groove portions 31 a extending in thefront and rear direction denoted with the arrows A1 and A2 along theaxis direction of the driver bit 2 are formed at two locations on sideparts facing in a radial direction. The rotation guide member 31 isconnected to the holding member 30 via connecting members 30 bconfigured to penetrate the holding member 30 in the radial directionand to protrude from both sides of the holding member 30 as theconnecting members 30 b enter the groove portions 31 a.

The holding member 30 is provided with hole portions penetrating in adirection perpendicular to a rotation direction of the driver bit 2, andthe connecting members 30 b are inserted into the hole portions andfixed by pins 30 f. The connecting member 30 b is constituted by acylindrical member having an oval cross section.

In the connecting member 30 b, a long-side direction of the oval shapeis a direction along the extension direction of the groove portion 31 aparallel to the axis direction of the driver bit 2 denoted with thearrows A1 and A2, and a short-side direction of the oval shape is adirection (denoted with arrows B1 and B2) orthogonal to the extensiondirection of the groove portion 31 a, i.e., a direction along therotation direction of the rotation guide member 31. The connectingmember 30 b is configured such that a width of the oval shape in theshort-side direction, i.e., a width along the rotation direction of therotation guide member 31 is slightly smaller than a width of the grooveportion 31 a along the same direction.

Thereby, the connecting member 30 b inserted in the groove portion 31 ais supported by the groove portion 31 a so as to be movable along theaxis direction of the rotation guide member 31. Further, the movement ofthe connecting member 30 b along the rotation direction of the rotationguide member 31 is restricted between one side surface and the otherside surface of the groove portion 31 a along the extension direction ofthe groove portion 31 a. Therefore, a rotation operation of the rotationguide member 31 causes the connecting member 30 b to be pushed by oneside surface or the other side surface of the groove portion 31 aaccording to the rotation direction of the rotation guide member 31 andto be applied with a force in a circumferential force, which is therotation direction, from the rotation guide member 31.

Therefore, when the rotation guide member 31 rotates, the connectingmembers 30 b are pushed by the groove portions 31 a of the rotationguide member 31, so that the holding member 30 rotates together with therotation guide member 31. Further, the connecting members 30 b areguided by the groove portions 31 a of the rotation guide member 31, sothat the holding member 30 moves in the front and rear direction alongthe axis direction of the driver bit 2.

The moving member 32 is an example of a transmission member, andincludes a first moving member 32 a configured to rotate together withthe holding member 30 and to move the holding member 30 in the front andrear direction along the rotation guide member 31, a second movingmember 32 c configured to be supported via a bearing 32 b by the firstmoving member 32 a and to push the first moving member 32 a via thebearing 32 b, and a cushioning member 32 d attached to a rear side ofthe second moving member 32 c.

The first moving member 32 a is constituted by, for example, a circularcylinder-shaped member having an inner diameter slightly greater than anouter diameter of the rotation guide member 31, and configured to beinserted to an outer side of the rotation guide member 31. The firstmoving member 32 a is connected to the holding member 30 via theconnecting members 30 b protruding from the groove portions 31 a of therotation guide member 31, and therefore, is supported to be movablealong the axis direction of the rotation guide member 31.

The bearing 32 b is an example of a bearing and is inserted between anouter periphery of the first moving member 32 a and an inner peripheryof the second moving member 32 c. The first moving member 32 aconstitutes a bearing inner ring holding member configured to hold aninner ring of the bearing 32 b, and the second moving member 32 cconstitutes a bearing outer ring holding member configured to hold anouter ring of the bearing 32 b. In the bearing 32 b, the inner ring issupported by the outer periphery of the first moving member 32 a so asnot to be movable in the rotation direction and the axis direction, andthe outer ring is supported by the inner periphery of the second movingmember 32 c so as not to be movable in the rotation direction and theaxis direction.

Thereby, the second moving member 32 c is connected to the first movingmember 32 a via the bearing 32 b in a state where movement in the frontand rear direction along the axis direction is restricted. In addition,the second moving member 32 c is configured to rotatably support thefirst moving member 32 a via the bearing 32 b.

Therefore, as the second moving member 32 c moves in the front and reardirection along the axis direction, the first moving member 32 a ispushed by the second moving member 32 c via the bearing 32 b, and movesin the front and rear direction along the axis direction together withthe second moving member 32 c. In addition, the first moving member 32 ais configured to be rotatable with respect to the second moving member32 c that is not rotatable with respect to the rotation guide member 31.

The urging member 33 is constituted by a coil spring, in the presentexample, is inserted between the front frame 10 b provided on the frontside of the case 10 a of the tool body 10 and the second moving member32 c of the moving member 32, outside the rotation guide member 31, andis in contact with a spring seat 32 f arranged to contact an end face ofthe outer ring of the bearing 32 b. The urging member 33 is compressedas the moving member 32 moves in the forward direction denoted with thearrow A1, and urges the moving member 32 in the rearward directiondenoted with the arrow A2.

The first drive unit 4 includes a bit rotating motor 40 configured to bedriven by electricity supplied from the battery 12, and a speed reducer41. The bit rotating motor 40 is an example of the first motor, in whicha shaft 40 a of the bit rotating motor 40 is connected to the speedreducer 41, and a shaft 41 a of the speed reducer 41 is connected to therotation guide member 31. In the first drive unit 4, the speed reducer41 is configured to use a planetary gear, and the bit rotating motor 40is arranged coaxially with the rotation guide member 31, the holdingmember 30 and the driver bit 2 held by the holding member 30.

In the first drive unit 4, the bit rotating motor 40 and the speedreducer 41 are attached to a metal rear frame 10 c provided on a rearside of the case 10 a of the tool body 10, and the shaft 41 a of thespeed reducer 41 is supported by the rear frame 10 c via a bearing 42.The rotation guide member 31 is rotatably supported via the bearing 42,which is an example of a bearing, by connecting a rear end portion tothe shaft 41 a of the speed reducer 41 and supporting the shaft 41 a tothe rear frame 10 c via the bearing 42.

The bit holding unit 3 and the first drive unit 4 are integrallyassembled by connecting the front frame 10 b and the rear frame 10 cwith a coupling member 10 d extending in the front and rear direction,and the front frame 10 b is fixed to the case 10 a of the tool body 10by a screw 10 e.

Further, in the bit holding unit 3, an end portion on the front side ofthe rotation guide member 31 is supported via the bearing 34 a by thefront frame 10 b fixed to the front side of the case 10 a of the toolbody 10, and an end portion on the rear side of the rotation guidemember 31 is supported via the shaft 41 a of the speed reducer 41 andthe bearing 42 by the rear frame 10 c fixed to the rear side of the case10 a. Therefore, in the bit holding unit 3, the rotation guide member 31is rotatably supported by the tool body 10.

Thereby, the first drive unit 4 is configured to rotate the rotationguide member 31 by the bit rotating motor 40. When the rotation guidemember 31 rotates, the connecting members 30 b are pushed by the grooveportions 31 a of the rotation guide member 31, so that the holdingmember 30 configured to hold the driver bit 2 rotates together with therotation guide member 31.

The bit holding unit 3 is provided with a guide member 32 g on thesecond moving member 32 c. The coupling member 10 d is provided with apair of guide wall portions 10 g at an interval slightly larger than adiameter of the guide member 32 g, and the guide member 32 g is insertedbetween the pair of guide wall portions 10 g, so that the pair of guidewall portions 10 g faces a peripheral surface of the guide member 32 g.

Thereby, the guide member 32 g is guided to the coupling member 10 d, sothat the second moving member 32 c can move in the front and reardirection denoted with the arrows A1 and A2 along the axis direction ofthe driver bit 2 and the rotation following the rotation guide member 31is restricted.

FIGS. 6A and 6B are top cross-sectional views showing the example of theinternal structure of the fastening tool according to the presentembodiment, showing details of the second drive unit 5. Next, the seconddrive unit 5 is described with reference to the respective drawings.

The second drive unit 5 includes a bit moving motor 50 configured to bedriven by electricity supplied from the battery 12, and a speed reducer51. The bit moving motor 50 is an example of the motor and the secondmotor, in which a shaft 50 a of the bit moving motor 50 is connected tothe speed reducer 51, and a shaft 51 a of the speed reducer 51 isconnected to a pulley 52, which is an example of the rotation member. Inthe second drive unit 5, the pulley 52 is supported by the tool body 10via a bearing 53. In the second drive unit 5, the shaft 50 a of the bitmoving motor 50 is arranged along the extension direction of the handle11.

In the second drive unit 5, one end of a string-like wire 54, which isan example of the transmission member, is connected to the pulley 52,and the pulley 52 rotates, so that the wire 54 is wound along an outerperiphery 52 a of the pulley 52. In addition, the other end of the wire54 is connected to a wire connecting portion 32 h provided on the secondmoving member 32 c of the moving member 32. The transmission member mayalso be a string made of fibers or the like, a belt made of rubber orthe like, or a chain made of a metal or the like, as long as it hasflexibility to be wound along the outer periphery of the rotation membersuch as the pulley 52. When the transmission member is constituted by achain, the rotation member may be a sprocket having teeth.

Thereby, the second drive unit 5 is configured to move the second movingmember 32 c in the forward direction denoted with the arrow A1 byrotating the pulley 52 by the bit moving motor 50 to wind up the wire54. In the bit holding unit 3, when the second moving member 32 c movesforward, the first moving member 32 a is pushed via the bearing 32 b,and the first moving member 32 a moves forward along the axis direction,together with the second moving member 32 c. The first moving member 32a moves forward, so that the holding member 30 connected to the firstmoving member 32 a via the connecting members 30 b moves forward and thedriver bit 2 held by the holding member 30 moves in the forwarddirection denoted with the arrow A1.

The second drive unit 5 is arranged offset to one side with respect to asubstantial center in a right and left direction of the fastening tool 1so that a tangential direction of a portion of the pulley 52 where thewire 54 is wound follows the extension direction of the rotation guidemember 31. That is, the arrangement is such that a center of the pulley52, in the present example, the shaft 50 a of the bit moving motor 50 isoffset to one side with respect to the rotation guide member 31 and theouter periphery 52 a of the pulley 52 on which the wire 54 is to bewound overlaps the rotation guide member 31, when seen in the axisdirection of the pulley 52.

In addition, the pulley 52 and the like are arranged so that the wire 54between the pulley 52 and the second moving member 32 c is parallel tothe axis direction of the rotation guide member 31 in the radialdirection of the pulley 52, as shown in FIGS. 6A and 6B and is parallelto the axis direction of the rotation guide member 31 also in the axisdirection of the bit moving motor 50 orthogonal to the radial directionof the pulley 52, as shown in FIG. 1A.

Further, if the wire 54 is overlapped and wound on the pulley 52, adistance from the center of the pulley 52 to the wire 54 changesaccording to the number of turns. Therefore, the amount of movement ofthe driver bit 2 when the pulley 52 makes one rotation changes. Further,an angle between a direction, in which the wire 54 is stretched betweenthe pulley 52 and the second moving member 32 c, and a moving directionof the driver bit 2 along the axis direction of the rotation guidemember 31 changes.

Therefore, a diameter of the pulley 52 and the like are set so that anamount of rotation α of the pulley 52, which is required to move thedriver bit 2 by a predetermined amount by moving the moving member 32from one end portion to the other end portion within a movable rangealong one direction, is less than 360°.

Thereby, in an operation where the pulley 52 winds up the wire 54 so asto move the driver bit 2 by the predetermined amount, the wire 54 is notoverlapped and wound on the pulley 52, as shown in FIG. 6B, and theamount of movement of the driver bit 2 is suppressed from beinginaccurate. Further, a change in parallelism between the direction inwhich the wire 54 is stretched between the pulley 52 and the secondmoving member 32 c and the moving direction of the driver bit 2 alongthe axis direction of the rotation guide member 31 is suppressed.

Therefore, a relationship between the amount of rotation of the bitmoving motor 50 and the amount of movement of the holding member 30becomes a one-to-one relationship over the entire movable range of theholding member 30, so that the amount of movement of the holding member30 along the axis direction of the rotation guide member 31 can becontrolled by controlling the amount of rotation of the bit moving motor50. That is, the amount of movement of the driver bit 2 attached to theholding member 30 can be controlled by controlling the amount ofrotation of the bit moving motor 50.

Further, regardless of the winding amount of the wire 54, the tensionthat is applied to the wire 54 is always parallel to the movingdirection of the driver bit 2 along the axis direction of the rotationguide member 31, so that the movement of the driver bit 2 and thedecrease in transmission efficiency of the force for pushing the screw200 via the driver bit 2 can be suppressed.

Thereby, the wire 54 between the pulley 52 and the second moving member32 c is stretched linearly along the moving direction of the movingmember 32, and increases in load at a time of winding up the wire 54 bythe pulley 52 and load at a time of pulling out the wire 54 from thepulley 52 are suppressed.

Note that, since the wire 54 has flexibility that enables the winding onthe pulley 52, the wire cannot move the moving member 32 rearward bypushing the second moving member 32 c. Therefore, provided is the urgingmember 33 that is compressed as the moving member 32 moves in theforward direction denoted with the arrow A1 and applies a force, whichpushes the moving member 32 in the rearward direction denoted with thearrow A2, to the moving member 32. Thereby, in the configuration wherethe wire 54 is wound by the pulley 52 and the driver bit 2 is advanced,the driver bit 2 after the advance can be moved rearward.

In addition, the holding member 30 configured to hold the driver bit 2is supported to be movable in the front and rear direction with respectto the rotation guide member 31 and is configured to rotate togetherwith the rotation guide member 31 by the engagement between theconnecting members 30 b provided to the holding member 30 and the grooveportions 31 a provided to the rotation guide member 31.

Therefore, in the configuration where the bit rotating motor 40 isarranged coaxially with the rotation guide member 31, the holding member30, and the driver bit 2 held by the holding member 30, it is possibleto implement a configuration where the driver bit 2 is rotated and thedriver bit 2 is moved in the front and rear direction without moving thebit rotating motor 40 in the front and rear direction.

Note that, in the configuration where the bit rotating motor 40 isarranged coaxially with the driver bit 2, a configuration is consideredin which the rotation operation of the bit rotating motor 40 isconverted into the movement of the driver bit 2 in the front and reardirection by using a feed screw.

However, in the configuration where the feed screw is used, an amount ofadvance of the driver bit 2 per rotation of the motor cannot beincreased, so that it is difficult to increase the moving speed of thedriver bit 2 even when the rotation speed of the motor is increased.

In the fastening tool 1, it is necessary to increase the moving speed ofthe driver bit 2 so as to shorten a time required to press the screw 200against the fastening target with the driver bit 2. However, in theconfiguration where the feed screw is used, it is difficult to shortenthe time required to press the screw 200 against the fastening targetwith the driver bit 2.

In contrast, in the configuration where the holding member 30 configuredto hold the driver bit 2 is supported so as to be movable in the frontand rear direction with respect to the rotation guide member 31, thepulley 52 is rotated by the second drive unit 5 to wind up the wire 54,and to move the holding member 30 forward, the moving speed of thedriver bit 2 can be increased according to the rotation speed of the bitmoving motor 50. Therefore, it is possible to shorten the time requiredto press the screw 200 against the fastening target with the driver bit2.

FIGS. 7A and 7B are cross-sectional views showing an example of anattaching/detaching holding mechanism, and FIGS. 8A and 8B areperspective views showing the example of the attaching/detaching holdingmechanism, showing details of the attaching/detaching holding mechanism30 c. Next, the attaching/detaching holding mechanism 30 c is describedwith reference to the respective drawings.

The attaching/detaching holding mechanism 30 c includes a ball 30 dexposed in the opening 30 a and a spring 30 e for pressing the ball 30 din a direction in which the ball is exposed in the opening 30 a. Thespring 30 e is an example of the pressing member, and is constituted bya leaf spring, an urging member such as a coil, or an elastic membersuch as rubber, and in the present example, is constituted by an annularleaf spring and is fitted on the outer periphery of the holding member30.

When the insertion portion 20 of the driver bit 2 is inserted into theopening 30 a of the holding member 30, the attaching/detaching holdingmechanism 30 c causes the ball 30 d pushed by the insertion portion 20to retreat in the outer periphery direction of the holding member 30while deforming the spring 30 e in a direction in which a diameter ofthe annular spring 30 e increases.

When the insertion portion 20 of the driver bit 2 is inserted into theopening 30 a of the holding member 30 up to a position where a grooveportion 20 a formed on the outer periphery of the insertion portion 20faces the ball 30 d, the ball 30 d urged by the spring 30 e is fittedinto the groove portion 20 a. This prevents the driver bit 2 from beingcarelessly separated from the holding member 30.

Further, when a predetermined force or more is applied in a direction inwhich the driver bit 2 is pulled out from the holding member 30, theball 30 d retreats while deforming the spring 30 e in the direction inwhich the diameter of the annular spring 30 e increases, so that thedriver bit 2 can be pulled out from the holding member 30.

In the operation of inserting and pulling out the insertion portion 20of the driver bit 2 with respect to the opening 30 a of the holdingmember 30, the ball 30 d retreats in the outer periphery direction ofthe holding member 30. For this reason, a space for retreating the ball30 d is required on the outer periphery of the holding member 30. On theother hand, the holding member 30 is inserted in the cylindricalrotation guide member 31, so that it is not possible to secure a spacefor retreating the ball 30 d between the outer periphery of the holdingmember 30 and the inner periphery of the rotation guide member 31.

Further, when a diameter difference between the holding member 30 andthe rotation guide member 31 is set so as to secure a space forretreating the ball 30 d between the outer periphery of the holdingmember 30 and the inner periphery of the rotation guide member 31, it isnecessary to increase an outer diameter of the rotation guide member 31because a radial dimension of the driver bit 2 is determined andtherefore the outer diameter of the holding member 30 cannot be reduced.For this reason, the size of the device becomes large.

In contrast, the rotation guide member 31 is provided with the grooveportions 31 a configured to guide the connecting members 30 b. Thegroove portion 31 a penetrates from the inner peripheral side to theouter peripheral side of the rotation guide member 31, and extends inthe axis direction of the rotation guide member 31.

Therefore, the ball 30 d of the attaching/detaching holding mechanism 30c is provided aligned with the position of the groove portion 31 a ofthe rotation guide member 31. That is, in the holding member 30, theconnecting member 30 b and the ball 30 d of the attaching/detachingholding mechanism 30 c are provided coaxially along the axis directionof the rotation guide member 31. Thereby, the ball 30 d of theattaching/detaching holding mechanism 30 c is exposed to the grooveportion 31 a of the rotation guide member 31 in any of the operation inwhich the rotation guide member 31 and the holding member 30 rotate andthe operation in which the holding member 30 moves in the axis directionwith respect to the rotation guide member 31.

Therefore, the operation in which the insertion portion 20 of the driverbit 2 is inserted and pulled out with respect to the opening 30 a of theholding member 30 causes the ball 30 d retreating in the outer peripherydirection of the holding member 30 to enter the groove portion 31 a ofthe rotation guide member 31.

Therefore, with the configuration where the holding member 30 isinserted in the cylindrical rotation guide member 31, it is possible tosecure a space for retreating the ball 30 d of the attaching/detachingholding mechanism 30 c. In addition, by using the groove portion 31 ainto which the connecting member 30 b is inserted as a space forretreating the ball 30 d, an area of the opening provided to therotation guide member 31 is suppressed, and the strength can be secured.

Further, it is not necessary to secure a space for retreating the ball30 d between the outer periphery of the holding member 30 and the innerperiphery of the rotation guide member 31 by increasing the diameterdifference between the holding member 30 and the rotation guide member31, so that it is possible to suppress the increase in size of thedevice.

FIG. 9 is a perspective view showing an example of a screw feeding unitand a nose unit according to present embodiment, showing details of thescrew feeding unit 7 and the nose unit 8. Next, the screw feeding unit 7and the nose unit 8 are described with reference to each drawing.

The screw feeding unit 7 includes a screw feeding motor 70, a piniongear 71 attached to a shaft of the screw feeding motor 70 via a speedreducer, a rack gear 72 in mesh with the pinion gear 71, and an engagingpart 73 connected to the rack gear 72 and engaged with the connectedscrew fed from the screw accommodating unit 6.

The rack gear 72 of the screw feeding unit 7 is supported to be movablein the upper and lower direction along a feeding direction of theconnected screw. In the screw feeding unit 7, the screw feeding motor 70rotates forward and reversely, so that the engaging part 73 engaged withthe connected screw moves in the upper and lower direction and theconnected screw is fed.

The nose unit 8 includes an ejection passage 80 to which the screw 200is supplied by the screw feeding unit 7 and through which the driver bit2 passes, a contact member 81 having an ejection port 81 a formed tocommunicate with the ejection passage 80 and configured to come intocontact with a fastening target, a contact arm 82 configured to move inthe front and rear direction in conjunction with the contact member 81,and an adjusting part 83 configured to restrict an amount of movement ofthe contact arm 82. In addition, the nose unit 8 includes a cover member88 configured to cover a path, through which the screw 200 is to pass,from the screw accommodating unit 6 to the ejection passage 80 in anopenable and closable manner.

In the fastening tool 1, each component constituting the ejectionpassage 80, the contact member 81 and the contact arm 82 is assembled toconstitute the nose unit 8, and is fixed to the front frame 10 b and thenose body part 10 f constituting the tool body 10. In addition, thefastening tool 1 includes a contact switch part 84 configured to bepushed and actuated by the contact arm 82.

In the nose unit 8, the contact member 81 is supported to be movable inthe front and rear direction denoted with the arrows A1 and A2, and thecontact arm 82 is configured to move in the front and rear direction inconjunction with the contact member 81. In the nose unit 8, the contactmember 81 is urged forward by an urging member (not shown), and thecontact member 81 pressed against the fastening target and movedrearward is urged and moved forward by the urging member.

In the nose unit 8, an amount of movement of the contact arm 82 untilthe contact arm 82 is moved rearward due to the pressing of the contactarm 81 against the fastening target and the contact switch part 84 isactuated is adjusted by the adjusting part 83. The contact switch part84 is switched between actuation and non-actuation by being pushed bythe contact arm 82. In the present example, a state where the contactswitch part 84 is not pressed by the contact arm 82 and is not actuatedis referred to as ‘off of the contact switch part 84’, and a state wherethe contact switch part 84 is pushed by the contact arm 82 and is thusactuated is referred to as ‘on of the contact switch part 84’.

Next, configurations relating to control and operation of the fasteningtool 1 are described with reference to the respective drawings. Thefastening tool 1 includes a trigger 9 configured to receive an operationand a trigger switch part 90 configured to be actuated by an operationof the trigger 9. The trigger 9 is provided on a front side of thehandle 11 and is configured to be operable by a finger of a handgripping the handle 11. The trigger switch part 90 is configured to bepushed and actuated by the trigger 9.

The trigger switch part 90 is switched between actuation andnon-actuation by being pushed by the trigger 9. In the present example,a state where the trigger 9 is not operated, the trigger switch part 90is not pushed by the trigger 9 and the trigger switch part 90 is notactuated is referred to as ‘off of the trigger switch part 90’, and astate where the trigger 9 is operated and the trigger switch part 90 ispushed and actuated by the trigger 9 is referred to as ‘on of thetrigger switch part 90’.

The fastening tool 1 includes a control unit 100 configured to controlthe first drive unit 4, the second drive unit 5 and the screw feedingunit 7, based on outputs of the trigger switch part 90 configured to beactuated by the operation of the trigger 9 and the contact switch part84 configured to be pushed and actuated by the contact member 81.

The control unit 100 is constituted by a substrate on which variouselectronic components are mounted, and is provided to a substrateaccommodating part 111 provided on a back surface-side of the screwaccommodating unit 6 between the screw accommodating unit 6 and thehandle 11.

In a case of an electric tool used with holding the handle by a hand, anaccommodating unit for accommodating consumables such as screws isprovided in front of the handle. In order to be able to grip the handleby a hand, a space for a finger is required between the handle and theaccommodating unit.

Therefore, the fastening tool 1 is provided with the substrateaccommodating part 111 on the back surface-side of the screwaccommodating unit 6 by using a space between the screw accommodatingunit 6 and the handle 11.

In a case of an electric tool used with holding the handle by a hand, aconfiguration is suggested in which a battery is attached to a lowerpart of the handle and a substrate is provided between the handle andthe battery. With such a configuration, a dimension of the electric toolin the upper and lower direction along the extension direction of thehandle is increased.

In contrast, the substrate accommodating part 111 is provided on theback surface-side of the screw accommodating unit 6, so that theincrease in dimension of the fastening tool 1 in the upper and lowerdirection along the extension direction of the handle 11 is suppressed.Further, since the spirally wound connected screw is accommodated in thescrew accommodating unit 6, a surface of the screw accommodating unit 6facing the handle 11 is substantially circular. Thereby, it is possibleto secure a volume of the substrate accommodating part 111 whilesuppressing the increase in size of the fastening tool 1.

FIGS. 10A to 10C are perspective views showing the example of thefastening tool according to the present embodiment, as seen from therear, and FIG. 11 is a perspective view showing an example of a settingunit, showing a detail of a setting unit 110. Next, the setting unit 110is described with reference to the respective drawings.

The fastening tool 1 includes the second drive unit 5 configured to movethe driver bit 2 in the front and rear direction along the axisdirection, and the second drive unit 5 is configured to be driven by thebit moving motor 50, and the moving member 32 connected, by the wire 54,to the pulley 52 configured to be driven and to rotate by the bit movingmotor 50 and the holding member 30 connected to the moving member 32 areconfigured to move forward along the axis direction of the driver bit 2,along the rotation guide member 31.

Thereby, an amount of movement (amount of advance) of the driver bit 2can be controlled by controlling an amount of rotation of the bit movingmotor 50. That is, by rotating the bit moving motor 50 in conjunctionwith the rotation of the bit rotating motor 40 configured to rotate thedriver bit 2 in a direction in which the screw 200 is fastened, theamount of advance of the driver bit 2 configured to advance followingthe screw 200 is controlled by an amount of rotation of the bit movingmotor 50, as the screw 200 is fastened. As a result, a stop position ofthe driver bit 2 along the axis direction can be controlled.

Therefore, the fastening tool 1 includes a setting unit 110 configuredto set an amount of advance of the driver bit 2. The setting unit 110 isan example of the setting means, and is configured so that any settingvalue can be selected from a plurality of setting values or any settingvalue can be selected steplessly.

In the present example, the setting unit 110 is configured so that asetting value is selected by an operation unit 110 a constituted by abutton. In addition, the operation unit 110 a may be configured suchthat a setting value is selected by a rotary dial. Further, the settingunit 110 may have a configuration of displaying a selected setting valueby a method of indicating a current value with a label, a stamp or thelike, a method of indicating a current value with a display unit 110 bsuch as an LED or the like, or the like so that an operator can easilyperceive the current setting value.

The setting unit 110 is provided on each of both left and right sides ofa surface of a side, which faces the handle 11, of the substrateaccommodating part 111 provided on the back surface-side of the screwaccommodating unit 6.

This makes it possible to visually recognize the setting unit 110 fromboth the left and right sides of the handle 11, when seeing thefastening tool 1 from the rear.

In a use aspect in which the handle 11 is held by a hand, the surface ofthe side of the screw accommodating unit 6, which faces the handle 11,faces toward the operator holding the fastening tool 1. Thereby, thesetting unit 110 is provided on the surface of the side, which faces thehandle 11, of the substrate accommodating part 111 provided on the backsurface-side of the screw accommodating unit 6, so that the display unit110 b provided on the setting unit 110 can be easily seen. Therefore, itis possible to reduce a possibility that the operator will miss thedisplay. Note that, the content that is displayed on the display unit110 b includes an ON/OFF state of a power supply, an operation modeselected from a variety of selectable operation modes, presence orabsence of a screw, a remaining amount of screws, presence or absence ofan abnormality, and the like, in addition to a setting value of a screwdepth prescribed by an amount of advance of the driver bit 2.

In addition, in the use aspect in which the handle 11 is held by a hand,the operation unit 110 a such as a button provided on the setting unit110 can also be easily seen. Therefore, in a state of holding the handle11 with one hand, the operation unit 110 a can be operated with theother hand while visually recognizing the operation unit 110 a, so thatthe operation can be reliably performed. Further, the display unit 110 bcan be seen without changing a posture or largely changing the line ofsight during a work, so that it is possible to prevent an alarm or thelike from not being noticed during a continuous work. Further, it ispossible to prevent the ejection port 81 a from being unconsciouslydirected toward the operator when the operator tries to gaze at thedisplay unit 110 b or the operation unit 110 a.

In addition, the substrate constituting the control unit 100 isaccommodated in the substrate accommodating part 111. A surface of aside, which faces the handle 11, of the substrate is mounted withswitches and the like constituting the operation unit 110 a and lampsand the like constituting the display unit 110 b, so that a substratefor the setting unit 110 separate from the control unit 100 can beomitted.

Operation Example of Fastening Tool of Present Embodiment

FIG. 12A is a side cross-sectional view showing an example of anoperation of the fastening tool according to the present embodiment, andFIG. 12B is a top cross-sectional view showing the example of theoperation of the fastening tool according to the present embodiment.Next, a fastening operation of the fastening tool according to thepresent embodiment is described with reference to the respectivedrawings.

In a standby state, as shown in FIG. 1A, a tip end of the driver bit 2is located at a standby position P1 behind the ejection passage 80, andthe fastening tool 1 can supply the screw 200 to the ejection passage80.

When the contact member 81 is pressed against the fastening target, thecontact switch part 84 is pushed by the contact arm 82, the contactswitch part 84 becomes on, the trigger 9 is operated and the triggerswitch part 90 becomes on, the control unit 100 drives the bit movingmotor 50 of the second drive unit 5 and also drives the bit rotatingmotor 40 of the first drive unit 4 at a predetermined timing.

When the bit moving motor 50 is driven and rotates in a positivedirection, which is one direction, the pulley 52 rotates in the positivedirection, so that the wire 54 is wound on the pulley 52. The wire 54 iswound on the pulley 52, so that the second moving member 32 c connectedto the wire 54 is guided to the rotation guide member 31 and movesforward along the axis direction. When the second moving member 32 cmoves forward, the first moving member 32 a is pushed by the secondmoving member 32 c via the bearing 32 b, and moves forward along theaxis direction while compressing the urging member 33, together with thesecond moving member 32 c.

When the first moving member 32 a moves forward, the connecting members30 b are guided to the groove portions 31 a of the rotation guide member31, so that the holding member 30 connected to the first moving member32 a by the connecting members 30 b moves forward along the axisdirection of the driver bit 2.

Thereby, the driver bit 2 held by the holding member 30 moves in theforward direction denoted with the arrow A1, engages with the screw 200supplied to the ejection port 81 a of the nose unit 8, moves the screw200 forward and presses the same against the fastening target.

When the bit rotating motor 40 is driven and rotates in the positivedirection, which is one direction, the rotation guide member 31 rotatesin the positive direction. When the rotation guide member 31 rotates inthe positive direction, the connecting members 30 b connected to theholding member 30 is pushed by the groove portions 31 a of the rotationguide member 31, so that the holding member 30 rotates together with therotation guide member 31.

Thereby, the driver bit 2 held by the holding member 30 rotates thescrew 200 in the positive direction (clockwise direction) and screws thesame into the fastening target. The control unit 100 moves forward thedriver bit 2 by the second drive unit 5 to make the driver bit 2 tofollow the screw to be screwed into the fastening target, based on aload applied to the bit rotating motor 40, the number of rotations ofthe bit rotating motor 40, a load applied to the bit moving motor 50,the number of rotations of the bit moving motor 50, and the like, inconjunction with the operation of rotating the driver bit 2 by the firstdrive unit 4 to screw the screw into the fastening target.

As shown in FIGS. 12A and 12B, the control unit 100 stops the driving ofthe bit rotating motor 40 and moves reversely the bit moving motor 50when the tip end of the driver bit 2 protrudes from the ejection port 81a of the contact member 81 and reaches a predetermined actuation endposition P2. The control unit 100 determines that the tip end of thedriver bit 2 has reached the actuation end position P2, based on thenumber of rotations of the bit moving motor 50.

When the bit moving motor 50 rotates in an opposite direction, which isthe other direction, the pulley 52 rotates in the opposite direction, sothat the wire 54 is pulled out from the pulley 52. The wire 54 is pulledout from the pulley 52, so that the urging member 33 compressed by thesecond moving member 32 c moving forward is stretched to push the secondmoving member 32 c rearward.

The second moving member 32 c is pushed rearward by the urging member33, so that it is guided to the rotation guide member 31 and movesrearward along the axis direction. When the second moving member 32 cmoves rearward, the first moving member 32 a is pushed by the secondmoving member 32 c via the bearing 32 b, and moves rearward along theaxis direction, together with the second moving member 32 c.

When the first moving member 32 a moves rearward, the connecting members30 b are guided to the groove portions 31 a of the rotation guide member31, so that the holding member 30 connected to the first moving member32 a by the connecting members 30 b moves rearward along the axisdirection of the driver bit 2.

Thereby, the driver bit 2 held by the holding member 30 moves rearward,and the tip end of the driver bit 2 returns to the standby position P1.Note that, the moving member 32 is provided with the cushioning member32 d made of rubber or the like on a rear side of the second movingmember 32 c, so that while the second moving member 32 c moves rearward,the second moving member 32 c is suppressed from directly colliding withthe rear frame 10 c, and therefore, sound generation and damage can besuppressed. When the second moving member 32 c is pushed rearward by theurging member 33 and the tip end of the driver bit 2 returns to thestandby position P1, the control unit 100 stops the rotation of the bitmoving motor 50. When the trigger switch part 90 becomes off, thecontrol unit 100 rotates the screw feeding motor 70 in one direction tolower the engaging part 73. When the engaging part 73 descends to aposition where it engages with a next screw 200, the control unit 100raises the engaging part 73 by rotating reversely the screw feedingmotor 70, and supplies the next screw 200 to the ejection passage 80.

FIGS. 13A to 13C are cross-sectional views showing fastened states ofthe screw, in which FIG. 13A shows a state where a head portion 201 ofthe screw 200 does not float or is not buried with respect to a surfaceof a fastening target 202, i.e., is so-called flush with the surface,FIG. 13B shows a state where the head portion 201 of the screw 200floats from the fastening target 202, and FIG. 13C shows a state wherethe head portion 201 of the screw 200 is buried in the fastening target202.

In the fastening tool 1, in a case where the screw 200 is a countersunkscrew, the amount of advance of the driver bit 2 is preferably set sothat a surface of the head portion 201 of the screw 200 becomes the sameas, so-called flush with the surface of the fastening target 202 whenthe tip end of the driver bit 2 reaches the actuation end position P2,as shown in FIG. 13A. Note that, the screw 200 is not limited to thecountersunk screw, and in a case of a pan, a bind, a truss, or the like,the amount of advance of the driver bit 2 is preferably set so that theseat surface of the head portion 201 of the screw 200 is in contact withthe surface of the fastening target 202 and the head portion 201 of thescrew 200 does not float from the fastening target 202.

In a case where the head portion 201 of the screw 200 floats from thefastening target 202 at the time when the tip end of the driver bit 2reaches the actuation end position P2, as shown in FIG. 13B, the amountof advance of the driver bit 2 may be increased to advance the actuationend position P2. On the other hand, in a case where the head portion 201of the screw 200 is buried in the fastening target 202, as shown in FIG.13C, the amount of advance of the driver bit 2 may be reduced to retreatthe actuation end position P2.

Therefore, the amount of movement (amount of advance) of the driver bit2 can be set by the setting unit 110. The amount of movement (amount ofadvance) of the driver bit 2 is prescribed by the number of rotations(amount of rotation) of the bit moving motor 50. The bit moving motor 50is rotated by a set amount of rotation with the standby position P1,which is an initial position of the driver bit 2, as a starting point,and is then stopped or reversely rotated to control the actuation endposition P2. Therefore, the fastening target can be adjusted.

<Additional Notes>

This application discloses at least the following inventions (1) to(13).

(1) A fastening tool includes: a cylindrical rotation guide memberextending in one direction and rotatably supported by a bearing; aholding member having an opening in which a driver bit is detachablyinserted, and configured to move in an axis direction along theextension direction of the rotation guide member inside the rotationguide member and to rotate together with the rotation guide member; amoving member configured to move the holding member in a front and reardirection along the rotation guide member; a rotation member configuredto be driven and to rotate by a motor; and a transmission memberconnected to the moving member and having flexibility to be wound alongan outer periphery of the rotation member. The rotation member isrotated by the motor, so that the moving member is moved with thetransmission member in one direction in which a screw engaged with thedriver bit is pressed against a fastening target.

In the present invention, an amount of movement of the driver bit in onedirection in which the screw engaged with the driver bit is pressedagainst the fastening target and is fastened is controlled bycontrolling an amount of rotation of the motor.

(2) The fastening tool according to (1), where the transmission memberis stretched in a direction parallel to the extension direction of therotation guide member.

(3) The fastening tool according to (1) or (2), where arrangement ismade such that a center of the rotation member is offset to one sidewith respect to the rotation guide member and the outer periphery of therotation member on which the transmission member is wound overlaps therotation guide member, when seen in an axis direction of the rotationmember.

(4) The fastening tool according to any one of (1) to (3), where a shaftof the motor is offset to one side with respect to the rotation guidemember.

(5) The fastening tool according to any one of (1) to (4), where anamount of rotation of the rotation member, which is required to move themoving member from one end portion to the other end portion within amovable range along one direction, is less than 360°.

(6) The fastening tool according to (1) to (5), includes an urgingmember that is compressed as the moving member moves in one direction,in which the screw engaged with the driver bit is pressed against thefastening target, and urges the moving member in another directionopposite to the one direction.

(7) A fastening target includes: a tool body extending in one direction;a handle extending in another direction intersecting with the extensiondirection of the tool body; an accommodating unit provided on one sideof the handle along the extension direction of the tool body andconfigured to accommodate therein consumables; and a substrateaccommodating part provided on a surface of a side, which faces thehandle, of the accommodating unit and configured to accommodate thereina substrate.

In the present invention, the substrate accommodating part is providedon a back surface-side of the accommodating unit by using a spacebetween the accommodating unit and the handle.

(8) The fastening tool according to (7), where the substrateaccommodating part comprises a display unit provided on the surface ofthe side that faces the handle.

(9) The fastening tool according to (8), where the substrate is providedwith the display unit.

(10) The fastening tool according to any one of (7) to (9), where thesubstrate accommodating part has an operation unit provided on thesurface of the side that faces the handle.

(11) The fastening tool according to (10), where the substrate isprovided with the operation unit.

(12) The fastening tool according to (10), where the operation unit isprovided on each of both left and right sides of the surface of the sidewhich faces the handle.

(13) The fastening tool according to (8), where a content that isdisplayed on the display unit is at least one of a setting value of ascrew depth prescribed by an amount of advance of the driver bit, anON/OFF state of a power supply, a selected operation mode, presence orabsence of a screw, a remaining amount of screws, and presence orabsence of an abnormality.

1. A fastening tool comprising: a cylindrical rotation guide memberextending in one direction and rotatably supported by a bearing; aholding member having an opening in which a driver bit is detachablyinserted, and configured to move in an axis direction along theextension direction of the rotation guide member inside the rotationguide member and to rotate together with the rotation guide member; amoving member configured to move the holding member in a front and reardirection along the rotation guide member; a rotation member configuredto be driven and to rotate by a motor; and a transmission memberconnected to the moving member and having flexibility to be wound alongan outer periphery of the rotation member, wherein the rotation memberis rotated by the motor, so that the moving member is moved with thetransmission member in one direction in which a screw engaged with thedriver bit is pressed against a fastening target.
 2. The fastening toolaccording to claim 1, wherein the transmission member is stretched in adirection parallel to the extension direction of the rotation guidemember.
 3. The fastening tool according to claim 1, wherein arrangementis made such that a center of the rotation member is offset to one sidewith respect to the rotation guide member and the outer periphery of therotation member on which the transmission member is wound overlaps therotation guide member, when seen in an axis direction of the rotationmember.
 4. The fastening tool according to claim 1, wherein a shaft ofthe motor is offset to one side with respect to the rotation guidemember.
 5. The fastening tool according to claim 1, wherein an amount ofrotation of the rotation member, which is required to move the movingmember from one end portion to the other end portion within a movablerange along one direction, is less than 360°.
 6. The fastening toolaccording to claim 1, comprising an urging member that is compressed asthe moving member moves in one direction, in which the screw engagedwith the driver bit is pressed against the fastening target, and urgesthe moving member in another direction opposite to the one direction. 7.A fastening target comprising: a tool body extending in one direction; ahandle extending in another direction intersecting with the extensiondirection of the tool body; an accommodating unit provided on one sideof the handle along the extension direction of the tool body andconfigured to accommodate therein consumables; and a substrateaccommodating part provided on a surface of a side, which faces thehandle, of the accommodating unit and configured to accommodate thereina substrate.
 8. The fastening tool according to claim 7, wherein thesubstrate accommodating part comprises a display unit provided on thesurface of the side that faces the handle.
 9. The fastening toolaccording to claim 8, wherein the substrate is provided with the displayunit.
 10. The fastening tool according to claim 7, wherein the substrateaccommodating part has an operation unit provided on the surface of theside that faces the handle.
 11. The fastening tool according to claim10, wherein the substrate is provided with the operation unit.
 12. Thefastening tool according to claim 10, wherein the operation unit isprovided on each of both left and right sides of the surface of the sidewhich faces the handle.
 13. The fastening tool according to claim 8,wherein a content that is displayed on the display unit is at least oneof a setting value of a screw depth prescribed by an amount of advanceof the driver bit, an ON/OFF state of a power supply, a selectedoperation mode, presence or absence of a screw, a remaining amount ofscrews, and presence or absence of an abnormality.